This tired old canard of "Something from Nothing" is leveled at atheists by theists who don't know any better. This lie gives away the theist's ignorance of the science behind Big Bang theory (which rationalists in general accepts as true).

I think that the problem is worst than that. But first, I'll have to explain the phrase first.

"Something from nothing" is sometimes used by physicists while explaining the Big Bang theory. However, "nothing" is not the "nothing" that most people would imagine. Well, if there was just empty space and something just 'poofed' into existence - that would seem pretty absurd. But that is NOT what physicists mean. By nothing, they mean nothing that we know of exist. That is, matter, energy, space and time, as we know it, has not come into existence. Here, I'll let the physicists themselves do the talking:

But here's the crucial part - why I think the argument is just stupid right from the get go: NOBODY believes that. Even physicists would postulate something - say, a quantum fluctuation - that led up to the Big Bang.

Ultimately, there is still a fabric of reality. "Something" is still there. For the theists, it's their god(s) (which explains nothing). For us, non-believers, we generally accept what the scientific method has discovered about reality.

So the canard "something from nothing" is just bloody useless to begin with.

NothingnessThere's something deeper though. Why do people suppose that there would ever be "absolute nothingness"?

I'm not sure where I'm going with this train of thought. Perhaps you thought about it and might share some insights in the comments.

I think that existence is an intrinsic part of reality. If there is absolute nothingness, then there is no reality to speak of.

If there was nothing at all, no action, no entities, no na-da, nothing would ever happen. So something could never come from nothing.

Since we do in fact exist, that would also imply that there was always something around - not a moment in reality was there ever absolute nothingness.